title: Primary synovial non-Hodgkin's lymphoma in association with ankylosing spondylitis.
mesh_terms: D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D006801:Humans; D007719:Knee Joint; D008207:Lymphatic Metastasis; D016393:Lymphoma, B-Cell / Q000150:complications* / Q000175:diagnosis / Q000188:drug therapy; D008279:Magnetic Resonance Imaging; D008297:Male; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000473:pathology; D013583:Synovial Membrane / Q000473:pathology*